[EgoPath] Bezier curve visualization & groundtruth

[TranHuuNhatHuy]

Addressing #83 .

Accomplishments

Added EgoPath/create_path/common/create_bezier_gt.py, which reads drivable path info and images from each of 6 datasets (dirpath acquired via args), then outputs a new folder called bezier-visualization that stores all bezier visualizations and a JSON file named bezier_path.json that stores bezier info.

So basically for each dataset, the previous file structure:

|------ <dataset name in UPPERCASE>/              # i.e. CURVELANES
|              |------ image/
|              |------ segmentation/
|              |------ visualization/
|              |------ drivable_path.json

now becomes:

|------ <dataset name in UPPERCASE>/              # i.e. CURVELANES
|              |------ bezier-visualization/
|              |------ image/
|              |------ segmentation/
|              |------ visualization/
|              |------ bezier_path.json
|              |------ drivable_path.json

Currently currently across all 6 datasets. Below is an example of the finished BDD100K:

bezier_vis_bdd100k_demo.webm

[TranHuuNhatHuy]

Successfully ran across all 6 datasets with expected outputs. We can have some reviews later but it's fairly ready to be merged @m-zain-khawaja